Your doctor might recommend custom orthotics if you're an athlete, and you happen to be pregnant. 

When you get pregnant, you have lots of hormones going through your systems that can cause ligamentous laxity. 

The reason that's a problem if you're a runner is that you have rapid weight gain during pregnancy. That weight combined with additional relaxation in your feet can accentuate mild foot problems and even cause deformities that persist later after the pregnancy is over with. 

When does a pregnant runner need custom orthotics? 

Well, that's what we're talking about today on the Doc On The Run Podcast.